PORTER: SOFAR PROPAGATION OF WIDE-BAND SIGNALS TO LONG RANGES 



Dr. W. H. Munk (Institute of Geophysics and Planetary Physics, 

 University of California at San Diego) : He just volunteered for the 

 Steering Committee, didn't he? (Laughter) 



Dr. J. B. Hersey (Office of Naval Research) : Let me make this 

 comment. One of the functions of the AESD, which they perform 

 periodically, is to get the community together in a smaller workshop 

 than this to exchange views and present background papers specifically 

 on models. And I guess I need to know how this device is working. 



Mr. Spofford: Okay. In terms of ray programs, about 3 years 

 ago, LRAPP actually sponsored a ray tracing workshop that was 

 followed up about 6 months later by some strong recommendations on 

 what the next Navy standard ray tracing model should be. More 

 recently, AESD hosted a normal mode wave program kind of workshop. 

 Now, the program that Dr. Weinberg referred to, the latest CONGRATS 

 program, is more recent than these workshops. 



Dr. Weinberg: I'm not talking about that program. 



Mr. Spofford: Well, it's a ray program, I guess, in a sense. 

 I'm not sure; maybe I've missed the program he's referring to. 

 Basically, ray programs can construct this kind of arrival structure 

 in as much detail as you choose. It's the relation between the modes 

 and the rays that I'm having difficulty in interpreting. It's kind 

 of new to me. I don't know of any programs that do that. 



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